Add racket support, #159

ftplugin/racket.vim

@@ -0,0 +1,63 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'racket') == -1
+  
+" Language:     Racket
+" Maintainer:   Will Langstroth <will@langstroth.com>
+" URL:          http://github.com/wlangstroth/vim-racket
+
+setl iskeyword+=#,%,^
+setl lispwords+=module,module*,module+,parameterize,let-values,let*-values,letrec-values,local
+setl lispwords+=define-values,opt-lambda,case-lambda,syntax-rules,with-syntax,syntax-case,syntax-parse
+setl lispwords+=define-signature,unit,unit/sig,compund-unit/sig,define-values/invoke-unit/sig
+setl lispwords+=define-opt/c,define-syntax-rule
+setl lispwords+=struct
+
+" Racket OOP
+setl lispwords+=class,define/public,define/private
+
+" kanren
+setl lispwords+=fresh,run,run*,project,conde,condu
+
+" loops
+setl lispwords+=for,for/list,for/fold,for*,for*/list,for*/fold,for/or,for/and
+setl lispwords+=for/hash,for/sum,for/flvector,for*/flvector,for/vector
+
+setl lispwords+=match,match*,match/values,define/match,match-lambda,match-lambda*,match-lambda**
+setl lispwords+=match-let,match-let*,match-let-values,match-let*-values
+setl lispwords+=match-letrec,match-define,match-define-values
+setl lisp
+
+" Enable auto begin new comment line when continuing from an old comment line
+setl comments+=:;
+setl formatoptions+=r
+
+setl makeprg=raco\ make\ --\ %
+
+" Simply setting keywordprg like this works:
+"    setl keywordprg=raco\ docs
+" but then vim says:
+"    "press ENTER or type a command to continue"
+" We avoid the annoyance of having to hit enter by remapping K directly.
+nnoremap <buffer> K :silent !raco docs <cword><cr>:redraw!<cr>
+
+" For the visual mode K mapping, it's slightly more convoluted to get the 
+" selected text:
+function! s:Racket_visual_doc()
+  try
+    let l:old_a = @a
+    normal! gv"ay
+    call system("raco docs '". @a . "'")
+    redraw!
+    return @a
+  finally
+    let @a = l:old_a
+  endtry
+endfunction
+
+vnoremap <buffer> K :call <SID>Racket_visual_doc()<cr>
+
+nnoremap <buffer> <f9> :!racket -t %<cr>
+
+"setl commentstring=;;%s
+setl commentstring=#\|\ %s\ \|#
+
+endif